XML 53 R45.htm IDEA: XBRL DOCUMENT
v3.25.3

Goodwill and other intangible assets (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract] |
Reconciliation of the change in goodwill | Reconciliations of the changes in the carrying value of goodwill for the first nine months of 2025 and for the year ended December 31, 2024 follow (in millions).
| September 30, 2025 |  |  | December 31, 2024 |
Balance at the beginning of the year* | $ | 83,880 |  |  | $ | 84,626 |
Business acquisitions |  | 400 |  |  |  | 87 |
Other, including foreign currency translation |  | 245 |  |  |  | (833 | )
Balance at the end of the period* | $ | 84,525 |  |  | $ | 83,880 |
—————— * Net of accumulated goodwill impairm ents o f $11.5 billion as of September 30, 2025 and December 31, 2024 and $11.1 billion as of December 31, 2023.
Schedule of intangible assets | Other intangible assets are summarized below (in millions).
| September 30, 2025 |  |  | December 31, 2024 |
| Gross carrying amount |  | Accumulated amortization |  | Net carrying value |  |  | Gross carrying amount |  | Accumulated amortization |  | Net carrying value |
Insurance and other: |  |  |  |  |  |  |  |  |  |  |  |  |
Customer relationships | $ | 31,150 |  | $ | 9,428 |  | $ | 21,722 |  |  | $ | 30,941 |  | $ | 8,840 |  | $ | 22,101 |
Trademarks and trade names |  | 9,047 |  |  | 1,146 |  |  | 7,901 |  |  |  | 9,007 |  |  | 1,041 |  |  | 7,966 |
Patents and technology |  | 5,700 |  |  | 4,666 |  |  | 1,034 |  |  |  | 5,375 |  |  | 4,359 |  |  | 1,016 |
Other |  | 5,614 |  |  | 2,216 |  |  | 3,398 |  |  |  | 5,551 |  |  | 1,996 |  |  | 3,555 |
| $ | 51,511 |  | $ | 17,456 |  | $ | 34,055 |  |  | $ | 50,874 |  | $ | 16,236 |  | $ | 34,638 |
Railroad, utilities and energy: |  |  |  |  |  |  |  |  |  |  |  |  |
Customer relationships and contracts | $ | 1,540 |  | $ | 785 |  | $ | 755 |  |  | $ | 1,553 |  | $ | 728 |  | $ | 825 |
Other |  | 441 |  |  | 133 |  |  | 308 |  |  |  | 437 |  |  | 126 |  |  | 311 |
| $ | 1,981 |  | $ | 918 |  | $ | 1,063 |  |  | $ | 1,990 |  | $ | 854 |  | $ | 1,136 |

X
- Definition Tabular disclosure of the carrying value of finite and indefinite lived intangible assets in total and by major class. + References No definition available. + Details
Name: | brka_ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsByMajorClassTableTextBlock
Namespace Prefix: | brka_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 24 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482548/350-20-55-24 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1 Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1 Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1 Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1 Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1 Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1 Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1A Reference 12: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-2 + Details
Name: | us-gaap_ScheduleOfGoodwillTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration